Add more test cases to some of our core functionality. Drill into test coverage of files where we don't have proper coverage and fix.

[six7]

Some of our core functionality has flawed test coverage, we should look into what the biggest are and up our test coverage for those.

Contenders:

• packages/tokens-studio-for-figma/src/plugin/setValuesOnVariable.ts

[macintoshhelper]

Blockers

• Migration to Vitest and Playwright